Adaptor operated with predetermined call signal
专利汇可以提供Adaptor operated with predetermined call signal专利检索，专利查询，专利分析的服务。并且PURPOSE: To switch an incoming call to an automatic answering telephone set in the number of times of a call bell in response to the situation of telephone in a country by setting optionally the number of incoming call bell ringing between 1∼99.
CONSTITUTION: When the incoming call comes to telephone lines L
1 , L
2 , a photo- coupler 1 is activated in response to a 16Hz call signal to preset a counter 8 via monostable multivibrators 3, 4 and a differentiation circuit 5. An optional figure among 1∼99 is set to the counter 8 by using digital switches 6, 7, the number of ringing in 16Hz from the monostable multivibrator 3 is counted, a set figure is subtracted and when the content of the counter 8 reaches 0, a transistor (TR)14 is turned on to activate a relay Y-1 causing a contact y
1-1 to be switched over. The incoming call activates a relay Y-2 via the ringing circuit 20 of an automatic answering telephone set TAD to close a contact y
2-1 , and form a closing circuit. A response is transmitted from a tape T-1,and a tape T-2 records the opposite voice. When the caller hangs up, it is detected by a photocoupler 2 to turn off the TR14, and release the relay Y-1.
COPYRIGHT: (C)1986,JPO&Japio，下面是Adaptor operated with predetermined call signal专利的具体信息内容。
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